Microsoft fixes a bug that prevented opening classic Outlook. Migrating to the new Outlook is therefore not necessary yet.
Microsoft can check off a bug in the classic version of Outlook. Since September, Outlook users were seeing error messages when trying to open the mail client in Windows. This particularly affected the classic version of Outlook.
Although Microsoft initially wanted to push affected users toward the new Outlook app, they have now addressed the bug. In a brief statement, Microsoft says that adjustments have been made to make the mail client work again. If you continue to experience issues, you’ll need to request technical intervention through Exchange Online.
More Problems
The classic Outlook version in Windows is still facing some issues. For instance,
The simplest is enabling cross-tenant access and trusting multi-factor authentication (MFA) claims from other Microsoft Entra tenants through the Entra dashboard. The second workaround is to exclude external users from certain conditional access requirements. However, this approach requires more adjustments and doesn’t guarantee seamless communication.
While you don’t need to switch to the new Outlook yet, Microsoft won’t miss any opportunity to remind you that the old version’s days are numbered. Nevertheless, you can continue using the classic version until 2029. Since the beginning of this year, Microsoft has been forcing the transition, but there are ways to prevent this.
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